List.GetCheckedOutFiles API Returns Duplicate Site Path

Target SharePoint environment

SharePoint Online

What SharePoint development model, framework, SDK or API is this about?

SharePoint REST API

Developer environment

Windows

What browser(s) / client(s) have you tested

• 💥 Internet Explorer
• 💥 Microsoft Edge
• 💥 Google Chrome
• 💥 FireFox
• 💥 Safari
• mobile (iOS/iPadOS)
• mobile (Android)
• not applicable
• other (enter in the "Additional environment details" area below)

Additional environment details

No response

Describe the bug / error

The GetCheckedOutFiles() API method returns incorrect ServerRelativePath values with duplicated site paths for checked-out files.

The API returns a malformed path with the site segment duplicated:

<d:DecodedUrl>/sites/site-name/sites/site-name/Shared Documents/example-file.png</d:DecodedUrl>

The site path /sites/site-name appears twice consecutively, making the path invalid and unusable without manual correction.

Steps to reproduce

1. Upload a new file to any document library on a SharePoint Online site

2. Do NOT check in the file (leave it in checked-out state with no version)

3. Call the REST API endpoint:
   https://tenant.sharepoint.com/sites/site-name/_api/web/lists/getbytitle('Shared Documents')/GetCheckedOutFiles

4. Observe the ServerRelativePath.DecodedUrl values contain duplicate site paths

Expected behavior

For files with no checked-in version, the API should return the correct server-relative path:

<d:DecodedUrl>/sites/site-name/Shared Documents/example-file.png</d:DecodedUrl>

This path should be directly usable for:

• Constructing file URLs
• Making subsequent API calls
• Path-based file operations